172265 ⎘
Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves; Systems for determining direction or position line Rotating or oscillating beam beacons defining directions in the plane of rotation or oscillation
SYSTEM FOR LOCATING AN OBJECT FURNISHED WITH AN RFID TAG
#2Mobile device utilizing time of flight for personal security and localization
#3Tracking method and system for small animal research
#4ROBUST ULTRASONIC INDOOR POSITIONING SYSTEM WITH HIGH ACCURACY